A four horse day

A four horse day could mean a couple things, depending on who is speaking.

For example, it could mean:
"It's a very busy day at work"
Or
"It's nice to have so much free time to ride my horses"

A popular saying in the 20's, it had disappeared for several decades but has been making a comeback in recent years.

I can come out for one more, but I've got a four horse day tomorrow so I want to hit the hay before too late.

Man, I've been working so hard lately, can't wait for Sunday, it'll be a real four horse day!

formal four

A Shit, piss, jerk off, & a shower... all in one sitting

Bro, dirty Seren just completed the formal four!!

The Core Four

Many ask "What is the Core Four?" The core four is the name given to the four best friends who are practically gods in the world and they set their differences aside in order to succeed, they will never hold anything against one another...Ever.
They also play GTA V in the mean time. "Core Four Or Die"

The Core Four are the definition of Gods

four jacks

What a person says when they show their opponent(s) their winning hand in any any card game, especially poker. (Reference from the film, "The Sting"; said by Paul Newman.

Man 1: Four jacks.

Man 2: Fucking damn it.

almost four hundred dollars.

money approximately in the range between $350 - $399

but never exactly or over $400

how much did mom spend on you at lululemon?

almost four hundred dollars.

four in chinese 四

pronounced same as die (死) in chinese
four

你有沒有四個位
(do you have 4 seats)
four in chinese 四

Big Four

The Big Four are the largest railroad companies in the United States. The Big Four consists of CSX, BNSF, Union Pacific and Norfolk Southern. Kansas City Southern almost makes it in, but the foamers would never allow it.

John: Man, I saw locomotives from all Big Four railroads today!
Tom: Literally no one gives a shit about your train addiction, John.